surface magnification

例句：

1. 1. The microscope is used to observe the surface magnification of a sample.
   显微镜用于观察样品的表面放大率。
2. 2. The scientist measured the surface magnification of the lens.
   科学家测量了透镜的表面放大率。
3. 3. The engineer calculated the surface magnification of the machine parts.
   工程师计算了机器零件的表面放大率。